<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="handleAddRole">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              closable
              @close="removeRightById(scope.row, item1.id)"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag>{{ item1.authName }}</el-tag>
                <i class="el-icon el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  closable
                  @close="removeRightById(scope.row, item2.id)"
                >
                  <el-col :span="6">
                    <el-tag type="success">{{ item2.authName }}</el-tag>
                    <i class="el-icon el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="handleEditRole(scope.row)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="handleDeleteRole(scope.row)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 点击编辑按钮  可编辑角色 -->
    <el-dialog
      title="修改角色"
      :visible.sync="EditDialogVisible"
      width="50%"
      @close="EditDialogClose"
    >
      <el-form
        :model="roleForm"
        :rules="roleFormRules"
        ref="roleFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="roleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="roleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="EditDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="EditRoleOpt()">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 点击添加角色按钮 添加角色 -->
    <el-dialog
      title="添加角色"
      :visible.sync="AddDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addRoleForm"
        :rules="addRoleFormRules"
        ref="addRoleFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="AddDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoleOpt">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 角色列表
      roleList: [],
      // 控制分配权限对话框显示与关闭
      setRightDialogVisible: false,
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      // 默认选中的节点ID值数组
      defKeys: [],
      // 当前即将分配权限的角色Id
      roleId: "",
      // 控制编辑模态框的显示与隐藏
      EditDialogVisible: false,
      // 角色的表单对象
      roleForm: {
        id: "",
        roleName: "",
        roleDesc: ""
      },
      // 编辑角色表单验证规则
      roleFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" }
        ]
      },
      // 控制添加角色模态框
      AddDialogVisible: false,
      // 添加角色表单数据
      addRoleForm: {
        roleName: "",
        roleDesc: ""
      },
      // 添加角色表单验证规则
      addRoleFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" }
        ]
      }
    };
  },
  created() {
    // 获取所有角色的列表
    this.getRolesList();
  },
  methods: {
    // 调用接口 获取所有角色列表数据
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败!");
      }
      this.roleList = res.data;
    },
    // 根据ID删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败，请重试!");
      }

      // 成功之后刷新列表 会整个页面刷新
      // this.getRolesList();
      role.children = res.data;
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败!");
      }
      this.rightsList = res.data;
      // 递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归的形式获取角色下三级权限的ID 并保存到数组中
    getLeafKeys(node, arr) {
      // 如果当前节点node不包含children属性 则代表是三级权限
      if (!node.children) {
        return arr.push(node.id);
      }
      // 递归
      node.children.forEach(item => {
        this.getLeafKeys(item, arr);
      });
    },
    // 监听分配权限对话框关闭时间
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 分配权限按钮为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      const idStr = keys.join(",");

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr
        }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败!");
      }

      this.$message.success("分配权限成功!");
      this.getRolesList();
      this.setRightDialogVisible = false;
    },
    // 监听编辑按钮点击事件
    handleEditRole(row) {
      console.log(row);
      this.EditDialogVisible = true;
      this.roleForm.roleName = row.roleName;
      this.roleForm.roleDesc = row.roleDesc;
      this.roleForm.id = row.id;
    },
    // 监听编辑器关闭事件
    EditDialogClose() {
      this.roleForm = {
        roleName: "",
        roleDesc: ""
      };
    },
    // 监听编辑器确定按钮事件
    EditRoleOpt() {
      this.$refs.roleFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项!");
        }
        const { data: res } = await this.$http.put(
          `roles/${this.roleForm.id}`,
          { roleName: this.roleForm.roleName, roleDesc: this.roleForm.roleDesc }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("修改角色失败!");
        }
        this.$message.success("修改成功!");
        this.getRolesList();

        this.EditDialogVisible = false;
      });
    },
    // 监听删除按钮点击事件
    async handleDeleteRole(row) {
      // console.log(this.roleForm.id);
      const { data: res } = await this.$http.delete(`roles/${row.id}`);
      if (res.meta.status !== 200) {
        return this.$message.error("删除失败!");
      }
      this.$message.success("删除成功!");
      this.getRolesList();
    },
    // 监听添加角色按钮
    handleAddRole() {
      this.AddDialogVisible = true;
    },
    addRoleOpt() {
      // 首先进行表单预验证
      // console.log("aaa");
      this.$refs.addRoleFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项!");
        }
        const { data: res } = await this.$http.post(`roles`, this.addRoleForm);
        if (res.meta.status !== 201) {
          return this.$message.error("添加角色失败!");
        }
        this.$message.success("添加角色成功!");
        this.getRolesList();
        this.AddDialogVisible = false;
      });
    },
    // 监听添加角色关闭事件
    addDialogClosed() {
      // 清空表单
      this.$refs.addRoleFormRef.resetFields();
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
